docs: def kml_ground_overlay(tile_coords, tile_url):
      """
      Create a KML <GroundOverlay> for a certain TileCoordinate.
  
      Args:
          tile_coords (TileCoordinate): TileCoordinate
          tile_url (str): web-url to the actual tile image.
  
      Returns:
          KMLElement: the KML <GroundOverlay>
      """
      return KML.GroundOverlay(
          KML.name(kml_element_name(tile_coords, "GO")),
          KML.drawOrder(tile_coords.zoom),
          KML.Icon(
              KML.href(tile_url)
          ),
          KML.LatLonBox(
              *kml_lat_lon_box(tile_coords.geographic_bounds())
          ),
      )